Electric cut-out.



2 SHEEN-SHEET 1- T. E. MURRAY. ELECTRIC GUT-OUT.

APPLICATION FILED NOV. 9, 1908.

Patented May 25, 1909.

lllllllllllll T. E. MURRAY.

ELECTRIC CUT-OUT.

APPLICATION FILED NOV. 9. 190a.

Patented May 25, 1909.

2 SHEETS-SHEET 2- IHIWIIIIIWNI UNITED STATES PATENT ()FFICE.

THOMAS E. MURRAY, OF NEW YORK, N. Y.

ELECTRIC CUT-OUT.

To all whom it may concern:

Be it known that I, THOMAS EMURRAY, a citizen of the United States,residing at New York, in the county of New York and State of New York,have invented a certain new and useful Improvement in Electric Cut-Outs, of which the following is a specification.

The invention relates to electric cut outs and consists broadly in theconstruction of the fuse case holder, in the combination of ,the saidholder and base block, in the construction of the fuse case, and in themeans for indicating blowing of the fuse, all as more particularly setforth and pointed out in the claims.

In the accompanying drawingsFigure 1 is a plan view of my device. Fig. 2is a cross section on the line a, (c, of Fig. 1.

cross section on the line y, 'y, 'of Fig. 2. Fig.

'4 is a cross section on the line 2, z, of Fig. 2.

Fig. 5 is a perspective view of the fuse case holder with the fuse inplace. Fig. 6 is a perspective view of the cylindrical fuse case showingone end piece with its parts separated.

Similar letters and numbers of reference indicate like parts.

A is the base block preferably of porcelain.

' tive conductor 4, and the other fuse between the terminals of thenegative conductor 5. As the construction of these fuse case holders,and their arrangement in the base block is the same,-a description ofone will serve .for both.

In the base block A is formed a recess D, at each end of which issecured a metal clip E,

F. Each clip comprises a flat bottom plate Specification of LettersPatent.

Fig. 3 is a Patented May 25, 1909.

A Application filed November 9, 1908. Serial No. @61,650.

the side flanges on the head L of a. separable partition M of porcelain,which depends downwardly and is shouldered at N, to enter acorrespondingly formed socket in the bottom of the recess D. T heflanges on the head L, of the partition M, are slid into the grooves inthe sides of the opening K, and in this way the partition M and archedupper member I are detachably connected together.

In the partition M is a circular opening in which is inserted acylindrical fuse case of the cartridge type. Said case is constructed inthe following manner: O is the inclosing cylinder in which is disposedthe fuse strip P, embedded in powdered non-combustible material. On eachend of the cylinder 0 is secured a ring Q of metal having on its outerrim, lugs R. S is a' removable end piece formed integrally of sheetmetal, and having a bottom plate 6, two upwardly turned side plates 7,8, and a circular end plate 9, having edge recesses 10, and a centralopening 11 which receives the extremity of the fuse strip P. The endpiece S is applied to the extremity of the fuse cylinder O, so that thelugs R on ring Q enter the recesseslO, after which said lugs are bentover, as shown, thus securing said end piece in place. As the cylinder 0fits in the opening in partition M, one

end of ring Q is not applied to said cylinder until after said cylinderhas been inserted through and seated in said opening. The fuse caseholder, with the fuse case and partition M in place, as shown in Fig. 5,is then inserted in the recess D of the base block, the shoulderedportion N of the partition M entering the socket in the'bottom of saidrecess. The end pieces S then make contact with the clips E, F, thusconnecting the fuse strip P v in circuit.

In order to lock the fuse case holders in the base block, I provide aheaded rod T which passes through openings in lugs U on the base block,and also through the openings K in said holders. At the extremityof'said rod is made an aperture to receive the shackle of asealV,'.whereby withdrawal of the rod is prevented.

In order to provide means for conveniently showing the fact that a fusehas blown, I

make a downwardly inclined passage .VV in the head of partition M, thelower extremity of which registers with a small opening in the fuse case0. The explosion products resulting from the blowing of the fuse thenescape lee the fuse case and connections prevented, but

in case of explosion, the effects thereof are localized to theparticular recess in which the exploding fuse is situated.

. I claim:

1. The combination in a fuse case holder of an upper member, a dependingmember independently and detachably secured to said upper member andhaving a transverse opening, and a removable fuse case seated in andextending through said opening.

2. In an electric cut-out, a base block hav ing a recess and circuitterminals therein, an upper member on said base block, a dependingmember independently secured to said upper member, and'a fuse caseseated in and extending through said depending member making contactwith said base terminals.

3. In an electric cut-out, a base block having a recess and circuitterminals therein, an arched upper member having oppositely disposedgrooves in the arch wall, a depending member having, at one end, flangesconstructed to enter said grooves, and a fuse case seated in andextending through said depending member and making contact with saidbase terminals.

4. The combination in a fuse case holder, of an arched upper memberhaving grooves in the arch walls, a depending member having at one end,flanges constructed to enter said grooves, and provided below saidflanges with a transverse opening, and a fuse case seated in andextending through said transverse opening, and a passage in said fusecase and depending member for leading explosion products from said fuseto and against the under surface of said arch.

5. In an electric cut-out, a base block hav ing a recess, circuitterminals, each consisting of a pair of spring clips, within saidrecess, an upper member on said base block, a depending member securedto said upper member and entering said recess between said terminals,and a fuse case seated in and extending through said depending member 6.In an electric cut-out, a base block having a recess and circuitterminals therein, a

removable cover for said recess, a downwardly extending plateindependently se-, cured to the under side of said cover, and a fusecase removably seated in and extending through said plate and makingcontact at its ends with said base terminals.

7. In an electric cut out, a base blockhaving a recess and circuitterminals at opposite ends thereof, a removable cover for said recess, apartition secured on the under side of said cover and entering saidrecess between said terminals and having a transverse opening and a fusecase seated in and extending through said opening and making contactwith said terminals.

8. In an electric cut out, a base block having a recess and circuitterminals therein, a removable cover for said recess, and, secured onthe under side of said cover, a fuse case constructed to enter saidrecess and make contact with said terminals, and means for indicating onthe exterior of said cover, the blowing out of said fuse.

9. In an electric cut out, a base block having a recess and circuitterminals therein, a 4

removable cover for said recess, and, secured on the under side of saidcover, a fuse case constructed toienter said recess and make contactwith said terminals, and a passage for leading explosion products fromsaid fuse case to and against an exposed surface on the exterior of saidcover.

10. In an electric fuse case, the combination with a fuse strip andfilling, of a tubular envelop, a detachable end piece of conductingmaterial comprising two resilient side plates and an end plate, andmeans for detachably securing said end plate to the end of said tubularenvelop.

11. In an electric fuse case, the combina tion of a tubular envelop, ametal ring secured at one end thereof and having outwardly projectinglugs, and an end piece comprising integrally two side plates, a bottomplate and an end plate; the said end;

plate being constructed to close the end of said envelop andto be heldin place by engagement with saidlugs.

In testimony whereof I have aflixedmy signature in presence of twowitnesses.

THOMAS E. MURRAY. Witnesses:

GERTRUDE T. PORTER, MAY T. MCGARRY.

